What has lots of eyes, but can’t see?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

What is the longest word in the dictionary?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

I am an odd number. Take away a letter and I become even. What number am I?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

What has no start, end, or centre?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.